261424368 has 80 divisors (see below), whose sum is σ = 794547360. Its totient is φ = 82013184.

The previous prime is 261424349. The next prime is 261424381. The reversal of 261424368 is 863424162.

261424368 is a `hidden beast` number, since 2 + 614 + 2 + 4 + 36 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10455 + ... + 25142.

It is an arithmetic number, because the mean of its divisors is an integer number (9931842).

Almost surely, 2^261424368 is an apocalyptic number.

It is an amenable number.

261424368 is an abundant number, since it is smaller than the sum of its proper divisors (533122992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261424368 is a wasteful number, since it uses less digits than its factorization.

261424368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35631 (or 35619 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 261424368 is about 16168.6229469303. The cubic root of 261424368 is about 639.4138252668.

The spelling of 261424368 in words is "two hundred sixty-one million, four hundred twenty-four thousand, three hundred sixty-eight".